<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 搜索和添加区域 -->
      <div style="margin-top: 15px;">
          <el-row :gutter="20">
            <el-col :span="4">
              <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
            </el-col>
          </el-row>
      </div>
        <!-- 角色列表区域 -->
        <el-table :data="rolesList" border stripe>
          <!-- 展开列 -->
          <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row :class="['bdbottom',i1===0 ?'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                <!-- 渲染一级权限 -->
                <el-col :span="5">
                  <el-tag closable @close="removeRights(scope.row,item1.id)">{{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!-- 渲染二级和三级权限 -->
                <el-col :span="19">
                  <!-- 通过for循环嵌套渲染二级权限 -->
                  <el-row :class="[i2 === 0 ?'': 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                    <el-col :span="6">
                      <el-tag type="success" closable @close="removeRights(scope.row,item2.id)">{{item2.authName}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                      <el-tag :class="[i3 ===0 ?'':'bdtop']" v-for="(item3,i3) in item2.children" :key="item3.id" type="warning" closable @close="removeRights(scope.row,item3.id)">{{item3.authName}}</el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
            </template>
          </el-table-column>
          <el-table-column label="#" type="index"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="290px">
            <template slot-scope="scope">
              <!-- 修改按钮 -->
              <el-button type="primary" icon="el-icon-edit" size="mini" @click="showDialog(scope.row.id)">编辑</el-button>
              <!-- 删除按钮 -->
              <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)">删除</el-button>
              <!-- 分配角色按钮 -->
              <!-- <el-button type="warning" icon="el-icon-setting" size="mini"></el-button> -->
                <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
    </el-card>
    <!-- 添加用户对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClose">
      <!-- 内容主体区域 -->
      <el-form
      :model="addForm"
      :rules="addFormRules"
      ref="addFormRef"
      label-width="90px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改用户对话框 -->
    <el-dialog
      title="修改角色信息"
      :visible.sync="updateDialogVisible"
      width="50%"
      @close="updateDialogClose">
      <!-- 内容主体区域 -->
      <el-form
      :model="updateForm"
      :rules="updateFormRules"
      ref="updateFormRef"
      label-width="90px">
        <el-form-item label="角色名称">
          <el-input v-model="updateForm.roleName" disabled></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="updateForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="updateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="updateRole">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限的对话框 -->
    <el-dialog
      title="提示"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightsDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>

<script>
export default {
  data () {
    return {
      rolesList: [],
      // 所有权限数据
      rightsList: [],
      // 树形控件属性绑定
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点Id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: '',
      // 添加角色弹出框初始不显示
      addDialogVisible: false,
      // 编辑角色弹出框初始不显示
      updateDialogVisible: false,
      // 控制分配权限对话框的显示隐藏
      setRightDialogVisible: false,
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      updateForm: {},
      // 添加角色表单的验证规则对象
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' }
        ]
      },
      // 修改角色表单的验证规则对象
      updateFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' }
        ]
      }
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    async getRolesList () {
      const { data: res } = await this.$http.get('/roles')
      if (res.meta.status !== 200) {
        return this.$message.error('角色列表获取失败')
      }
      this.rolesList = res.data
    },
    // 监听添加用户对话框的关闭事件
    addDialogClose () {
      this.$refs.addFormRef.resetFields()
    },
    // 监听编辑用户对话框的关闭事件
    updateDialogClose () {
      this.$refs.updateFormRef.resetFields()
    },
    // 点击确定按钮添加新用户
    addRoles () {
      this.$refs.addFormRef.validate(async valid => {
        console.log(valid)
        if (!valid) return
        // 可以发起添加角色的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败')
        }
        this.$message.success('添加角色成功')
        // 隐藏对话框
        this.addDialogVisible = false
        // 重新获取用户列表数据
        this.getRolesList()
      })
    },
    // 修改角色信息
    async showDialog (id) {
      // console.log(id)
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('查询角色信息失败')
      // this.$message.success('查询用户信息成功')
      this.updateForm = res.data
      this.updateDialogVisible = true
    },
    // 点击确定修改用户信息
    updateRole () {
      this.$refs.updateFormRef.validate(async valid => {
        console.log(valid)
        if (!valid) return false
        // 可以发起修改用户的网络请求
        const { data: res } = await this.$http.put('roles/' + this.updateForm.roleId, this.updateForm)
        if (res.meta.status !== 200) {
          this.$message.error('修改角色信息失败')
        }
        this.$message.success('修改角色信息成功')
        // 隐藏对话框
        this.updateDialogVisible = false
        // 重新获取用户列表数据
        this.getRolesList()
      })
    },
    // 根据id删除对应角色数据
    async removeRoleById (id) {
      // 弹框询问用户是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch((err) => err)
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消了删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败!')
      }
      this.$message.success('删除角色成功!')
      this.getRolesList()
    },
    // 根据id删除对应权限数据
    async removeRights (role, rightId) {
      // 弹框询问用户是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch((err) => err)
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消了删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户权限失败!')
      }
      this.$message.success('删除用户权限成功!')
      // this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (roles) {
      this.roleId = roles.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }
      // 获取到的权限 数据，报错到data中
      this.rightsList = res.data

      // 递归获取三级节点的id
      this.getLeafKeys(roles, this.defKeys)
      // console.log(roles)

      this.setRightDialogVisible = true
    },
    // 递归的形式,获取角色下所有的三级权限的id,并保存到 defKeys数组中
    getLeafKeys (node, arr) {
      // 如果当前node没有children属性则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item =>
        this.getLeafKeys(item, arr))
    },
    // 每次关闭时清空id数组缓存
    setRightsDialogClosed () {
      this.defKeys = []
    },
    // 点击分配权限确定按钮为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配角色权限失败')
      }
      this.$message.success('角色权限分配成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>
